2101780822 has 24 divisors (see below), whose sum is σ = 3352955760. Its totient is φ = 987914880.

The previous prime is 2101780799. The next prime is 2101780847. The reversal of 2101780822 is 2280871012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 681079 + ... + 684157.

It is an arithmetic number, because the mean of its divisors is an integer number (139706490).

Almost surely, 2^2101780822 is an apocalyptic number.

2101780822 is a deficient number, since it is larger than the sum of its proper divisors (1251174938).

2101780822 is a wasteful number, since it uses less digits than its factorization.

2101780822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4296 (or 4279 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 31.

The square root of 2101780822 is about 45845.1831930029. The cubic root of 2101780822 is about 1280.9410442301.

The spelling of 2101780822 in words is "two billion, one hundred one million, seven hundred eighty thousand, eight hundred twenty-two".